Highest totals by Glamorgan in List A
Highest totals
Team | Score | Overs | RR | Inns | Opposition | Ground | Result | Match Date | Scorecard |
| 429 | 49.5 | 8.60 | 2 | v Surrey | The Oval | lost | 19 Jun 2002 | List A | |
| 373/7 | 60.0 | 6.21 | 1 | v Bedfordshire | Cardiff | won | 24 Jun 1998 | List A | |
| 356/7 | 50.0 | 7.12 | 1 | v Kent | Swansea | won | 14 May 2017 | List A | |
| 356/3 | 50.0 | 7.12 | 1 | v Worcs | Worcester | won | 23 Aug 2022 | List A | |
| 348/8 | 48.4 | 7.15 | 2 | v Sussex | Hove | won | 7 May 2019 | List A | |
| 345/2 | 60.0 | 5.75 | 1 | v Durham | Darlington | won | 26 Jun 1991 | List A | |
| 344/5 | 60.0 | 5.73 | 1 | v Lincolnshire | Swansea | won | 21 Jun 1994 | List A | |
| 343/5 | 47.4 | 7.19 | 2 | v Northants | Cardiff | won | 22 Aug 2023 | List A | |
| 340/4 | 50.0 | 6.80 | 1 | v Lincolnshire | Lincoln | won | 5 May 2004 | List A | |
| 334/7 | 48.5 | 6.83 | 2 | v Hampshire | Southampton | won | 12 May 2017 | List A | |
| 333/4 | 50.0 | 6.66 | 1 | v Dorset | Bournemouth | won | 21 Jun 2000 | List A | |
| 331/7 | 50.0 | 6.62 | 1 | v Gloucs | Bristol | won | 30 Apr 2019 | List A | |
| 330/3 | 46.4 | 7.07 | 2 | v Sussex | Hove | won | 20 Aug 2014 | List A | |
| 328/4 | 33.0 | 9.93 | 1 | v Lancashire | Colwyn Bay | won | 21 Aug 2011 | List A | |
| 328/6 | 49.3 | 6.62 | 2 | v W. Indies A | Ebbw Vale | won | 9 Aug 2006 | List A | |
| 324/8 | 50.0 | 6.48 | 1 | v Essex | Chelmsford | lost | 26 Jul 2016 | List A | |
| 323/7 | 50.0 | 6.46 | 1 | v Surrey | Cardiff | won | 28 Apr 2019 | List A | |
| 322/5 | 60.0 | 5.36 | 1 | v Oxfordshire | Swansea | won | 22 Jun 1993 | List A | |
| 321/7 | 49.4 | 6.46 | 2 | v Kent | Cardiff | won | 28 Jul 2015 | List A | |
| 320/5 | 50.0 | 6.40 | 1 | v Suffolk | Bury St Edmunds | won | 4 May 2005 | List A | |
| 318/3 | 55.0 | 5.78 | 1 | v Comb Univ | Cardiff | won | 25 Apr 1995 | List A | |
| 318/4 | 60.0 | 5.30 | 1 | v Staffs | Cardiff | won | 28 Jun 1989 | List A | |
| 316/8 | 60.0 | 5.26 | 1 | v Essex | Cardiff | won | 6 Jul 1994 | List A | |
| 314/2 | 46.4 | 6.72 | 2 | v Brit Univ | Cambridge | won | 28 Apr 1996 | List A | |
| 312/9 | 50.0 | 6.24 | 1 | v Durham CB | Darlington | won | 7 May 2003 | List A | |
| 308/7 | 48.2 | 6.37 | 2 | v Kent | Cardiff | won | 4 Aug 2022 | List A | |
| 308/7 | 48.3 | 6.35 | 2 | v Surrey | Guildford | won | 27 Jul 2014 | List A | |
| 308/7 | 50.0 | 6.16 | 1 | v Surrey | The Oval | lost | 13 Aug 2025 | List A | |
| 307 | 47.1 | 6.50 | 2 | v Warwickshire | Neath | lost | 10 Aug 2023 | List A | |
| 305/6 | 45.0 | 6.77 | 1 | v Worcs | Cardiff | won | 24 Jun 2001 | List A | |
| 304/8 | 59.4 | 5.09 | 2 | v Hampshire | Southampton | won | 9 Jul 1997 | List A | |
| 303/6 | 40.0 | 7.57 | 1 | v Leics | Swansea | won | 25 Aug 2013 | List A | |
| 302/9 | 50.0 | 6.04 | 2 | v Middlesex | Cardiff | lost | 23 May 2018 | List A | |
| 302/6 | 50.0 | 6.04 | 1 | v Sussex | Cardiff | won | 8 Jun 2016 | List A | |
| 302/6 | 55.0 | 5.49 | 1 | v Comb Univ | Cardiff | won | 12 May 1988 | List A | |
| 301/8 | 47.1 | 6.38 | 2 | v Somerset | Taunton | won | 20 Aug 2023 | List A | |
| 301/8 | 60.0 | 5.01 | 1 | v Essex | Chelmsford | lost | 12 Aug 1997 | List A | |
| 300/6 | 40.0 | 7.50 | 1 | v Unicorns | Southend-on-Sea | won | 9 Jun 2013 | List A | |
| 300/8 | 45.0 | 6.66 | 1 | v Warwickshire | Birmingham | won | 28 Jul 2002 | List A | |
| 299/2 | 46.1 | 6.47 | 2 | v Essex | Chelmsford | won | 3 May 2009 | List A | |
| 299/3 | 47.1 | 6.33 | 2 | v Derbyshire | Derby | won | 6 Aug 2023 | List A | |
| 299 | 49.3 | 6.04 | 2 | v Sussex | Hove | lost | 5 May 1998 | List A | |
| 297/7 | 50.0 | 5.94 | 1 | v Worcs | Worcester | lost | 22 Aug 2025 | List A | |
| 296/9 | 50.0 | 5.92 | 1 | v Durham | Nottingham | won | 19 Aug 2021 | List A | |
| 295/6 | 50.0 | 5.90 | 1 | v Northants | Northampton | won | 25 Jul 2021 | List A | |
| 295/4 | 60.0 | 4.91 | 1 | v Dorset | Swansea | won | 27 Jun 1990 | List A | |
| 294/7 | 40.5 | 7.20 | 2 | v Kent | Canterbury | won | 12 Jun 2016 | List A | |
| 294/4 | 45.0 | 6.53 | 1 | v Surrey | Pontypridd | won | 25 Jul 1999 | List A | |
| 293/5 | 48.0 | 6.10 | 2 | v Essex | Cardiff | won | 16 Aug 2021 | List A | |
| 292/6 | 39.5 | 7.33 | 2 | v Leics | Colwyn Bay | won | 10 Aug 2008 | List A | |
| 292/9 | 50.0 | 5.84 | 1 | v Hampshire | Southampton | lost | 19 Apr 2019 | List A | |
| 291/9 | 50.0 | 5.82 | 2 | v Kent | Cardiff | lost | 11 Jun 2006 | List A | |
| 290/2 | 53.1 | 5.45 | 2 | v Hampshire | Southampton | won | 9 May 1989 | List A | |
| 289/6 | 41.0 | 7.04 | 1 | v Essex | Cardiff | won | 19 Aug 2001 | List A | |
| 289 | 46.0 | 6.28 | 2 | v Somerset | Taunton | lost | 20 May 2018 | List A | |
| 289/6 | 47.0 | 6.14 | 1 | v Somerset | Taunton | won | 12 Aug 2014 | List A | |
| 289 | 49.5 | 5.79 | 1 | v Gloucs | Cardiff | won | 6 Jun 2016 | List A | |
| 288/6 | 50.0 | 5.76 | 1 | v Essex | Cardiff | won | 31 Jul 2015 | List A | |
| 288/9 | 50.0 | 5.76 | 1 | v Gloucs | Bristol | lost | 15 Aug 2025 | List A | |
| 286/8 | 50.0 | 5.72 | 2 | v Somerset | Taunton | lost | 22 Apr 2007 | List A | |
| 285/7 | 40.0 | 7.12 | 1 | v Yorkshire | Colwyn Bay | won | 5 May 2013 | List A | |
| 285 | 45.0 | 6.33 | 2 | v Essex | Southend-on-Sea | lost | 3 Sep 2000 | List A | |
| 285 | 49.4 | 5.73 | 1 | v Middlesex | Lord's | lost | 5 May 2019 | List A | |
| 283 | 49.4 | 5.69 | 1 | v Essex | Chelmsford | won | 4 Aug 2024 | List A | |
| 283/5 | 60.0 | 4.71 | 1 | v Sussex | Cardiff | won | 11 Jul 1990 | List A | |
| 283/3 | 60.0 | 4.71 | 1 | v Warwickshire | Birmingham | lost | 26 Jun 1976 | List A | |
| 281/6 | 40.0 | 7.02 | 2 | v Gloucs | Cardiff | lost | 19 May 2013 | List A | |
| 281/4 | 48.2 | 5.81 | 2 | v Sussex | Cardiff | won | 1 Jun 2018 | List A | |
| 281/7 | 50.0 | 5.62 | 1 | v Essex | Cardiff | won | 7 May 2017 | List A | |
| 280/3 | 40.0 | 7.00 | 1 | v Middlesex | Lord's | won | 6 May 2013 | List A | |
| 280/8 | 45.0 | 6.22 | 1 | v Worcs | Cardiff | won | 3 Sep 2002 | List A | |
| 279 | 45.2 | 6.15 | 2 | v Somerset | Taunton | lost | 24 Jul 2016 | List A | |
| 279/9 | 60.0 | 4.65 | 1 | v Worcs | Swansea | won | 28 Jul 1993 | List A | |
| 278/2 | 45.3 | 6.10 | 2 | v Notts | Neath | won | 31 Jul 2024 | List A | |
| 278/3 | 45.4 | 6.08 | 2 | v Leics | Cardiff | won | 26 Aug 2025 | List A | |
| 278/6 | 46.3 | 5.97 | 2 | v Sussex | Hove | won | 13 Aug 2023 | List A | |
| 278/9 | 50.0 | 5.56 | 1 | v Notts | Cardiff | lost | 17 Aug 2025 | List A | |
| 277/9 | 50.0 | 5.54 | 2 | v Gloucs | Colwyn Bay | lost | 10 Jun 2007 | List A | |
| 277/8 | 50.0 | 5.54 | 1 | v Leics | Leicester | n/r | 5 Aug 2021 | List A | |
| 277/7 | 50.0 | 5.54 | 1 | v Gloucs | Bristol | won | 27 Apr 2017 | List A | |
| 277/5 | 55.0 | 5.03 | 1 | v Comb Univ | Cardiff | won | 5 May 1992 | List A | |
| 277/7 | 55.0 | 5.03 | 1 | v Essex | Chelmsford | won | 23 Apr 1995 | List A | |
| 274/5 | 44.0 | 6.22 | 2 | v Worcs | Worcester | won | 17 Jul 2005 | List A | |
| 274 | 49.3 | 5.53 | 1 | v Kent | Canterbury | lost | 25 May 2018 | List A | |
| 272/4 | 45.0 | 6.04 | 1 | v Middlesex | Cardiff | won | 16 Sep 2001 | List A | |
| 271/4 | 40.0 | 6.77 | 1 | v Lancashire | Manchester | lost | 2 May 2010 | List A | |
| 271 | 54.4 | 4.95 | 2 | v Kent | Cardiff | lost | 16 May 1987 | List A | |
| 269/2 | 38.1 | 7.04 | 2 | v Essex | Cardiff | won | 13 Jul 2003 | List A | |
| 269/6 | 50.0 | 5.38 | 1 | v Somerset | Taunton | lost | 11 Jul 2001 | List A | |
| 266 | 43.5 | 6.06 | 1 | v Lancashire | Colwyn Bay | won | 5 Aug 2001 | List A | |
| 266 | 48.2 | 5.50 | 2 | v Middlesex | Cardiff | lost | 14 Jun 2016 | List A | |
| 266/8 | 50.0 | 5.32 | 1 | v Surrey | The Oval | lost | 6 Jun 2018 | List A | |
| 265/8 | 40.0 | 6.62 | 1 | v Leics | Leicester | won | 19 Jun 2013 | List A | |
| 265/4 | 48.5 | 5.42 | 2 | v Middlesex | Lord's | won | 7 May 1996 | List A | |
| 264 | 49.3 | 5.33 | 1 | v Gloucs | Cardiff | lost | 18 May 2018 | List A | |
| 263/5 | 45.0 | 5.84 | 1 | v Hampshire | Southampton | won | 14 Aug 2000 | List A | |
| 262/8 | 40.0 | 6.55 | 2 | v Northants | Colwyn Bay | lost | 9 Aug 2009 | List A | |
| 262/6 | 45.0 | 5.82 | 1 | v Gloucs | Bristol | lost | 25 Sep 2005 | List A | |
| 262 | 48.4 | 5.38 | 2 | v Leics | Leicester | lost | 11 Aug 2024 | List A | |
| 260/8 | 40.0 | 6.50 | 2 | v Notts | Swansea | lost | 31 Jul 2011 | List A |
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